Ventilator



M.NELSON Sept. 20, 1938.

VENTILATOR Filed De'c. 6, 1937 -porated in walls Patented Sept. 20, 1938 UNITED STATES- PATENT OFFICE VENTILATOR Mathews Nelson, Tulsa, Okla.

Application December 6, 1337,

5 Claims.

The present invention relates to improvements in window constructions, and in particular to that type adapted to serve as ventilators when incorof buildings for admitting light and air to the interior thereof.

The primary object of the invention is the provision of simple, inexpensive vent units by means of which a wall opening may opened for ventilating purposes, said unit including preferably a screening element to prevent access of insects or animals when in open position.

A further object in view is the provision of a construction of the above type with a manipulating member for opening a shutter or sash and holding it in either its open or closedpositions, said holding means cooperating in a novel manner with the frame of the unit to establish an interlock and prevent unintentional movement of the shutter.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the accompanying drawing,

Figure 1 is a view in elevation of an embodiment of the invention, the sash member being broken away to show details of construction.

Figure 2 is a similar view of the opposite side, showing the window sash closed and the locking lever in interlocked engagement with the window frame.

Figure 3 is an end elevation- Figure 4is a sectional view of the unit in its closed position; and

Figure 5 is a corresponding sectional view with the sash in open position.

Like reference characters designate correspondlng parts in the several figures of the drawing.

Referring to the drawing, dow frame, rectangular in form and preferably made [of light metal}. such, for example, as cast aluminum. This frame includes a grill'Z, the openings of which are preferably relatively small I designates the winso as to form an adequate guard for the opening in which the unit structure may be installed. A screen member 3 is arranged at the outer'side of the grill, and is held in position by-the side bar members 4, the mesh of this screen being of sufficient size to preclude the entry of insects, flies, termites, etc.

It will be noted particularly in Figure 3 that the bars 4 are secured to the frame I by the screws 4' against the screen, and are specially formed at the top toprovide pintle-receiving be closed or variably Serial No. 178,369 (CI. 98-88) seats 5. A strand of wire 6 may be stretched across the bottom of the screen so as to hold the same against the face of the frame I, said wire being clamped at its ends beneath the bars 4.

A closure sash comprising a rectangular frame .1 with an intermediate crossbar 8, and a glass or translucent panel 9 held in place by removable lugs 9, is disposed at one side of the screen, and, when closed, lies flush with the side bars 4. The sash frame at the top is formed with pintles or trunnions I ll engaging in the closed seats 5, above referred to, formed by the curved end of the bars 4 in cooperation with the adjacent face of the frame. The bars, therefore, performthe dual function of holding the screen in place and swingably supporting the sash in position over the opening through the window frame.

Toenable the sash to be swung to and from its closed position from one side of the unit, I provide a handle lever H pivotally connected to g the lug l2 formed integrally with the sash bar 8, said lever extending through openings IS in the screen and grill and having notches M in its under edge to engage with the grill for holding the sash in open positions, as clearly shown in 25 Figure 5. The tail piece or extremity I la of the lever is beveled at llb, so that, when the sash is dropped and the lever falls into vertical position, it may be pushed inwardly against a 'camming face H at the bottom of the frame I, causingthe sash to rise vertically until the end of the lever drops into the locking recess 15. Thus the weight of the sash holds the lever in this interlocking position, clamping the sash closed. Lifting the lever vertically against this weight will free the lever from the recess and permit the sash to be again swung as desired. It will be noted in Figure 3, that the seats 5 are sufficiently large to permitthe pintles 10 to rise far enough to disengage the sash lever. 40

It is to be understood that the screen element of the above described unit may be dispensed with when desired, and I, therefore, do not wish to be confined to its use in this construction.

Having thus described my invention, what I claim as. new and desire to secure by Letters Patent is:

1. A ventilator construction of. the class describedcomprising a frame, a closure member swingably connected to the frame, and a handle lever pivotally connected to the closure member at one end and engageable with the frame to hold the closure member in open position, the frame having a locking recess inwhich the handle lever engages when the closure member is in closed position to lock the closure member in said position. 1

2. A ventilator construction of the class described comprising a window frame, a sash for closing said frame having pintles projecting from the sides thereof, side bars connected to the frame and formed with pintle-receiving seats in which the pintles are mounted for swinging and vertical movements, and a locking lever connected. to the sash, said frame having a recess therein to receive the end of the lever, and means for raising the sash vertically through the lever to establish interengagement between the lever and the recess.

3. A ventilator construction as set forth in claim 2, combined with a screen arranged across the frame and clamped against the same by the 7 side bars.

4. A ventilator unit comprising a frame and grill, a sash closure therefor having pintles, sidebars connected to the frame and provided with pintle-receiving seats at the upper ends thereof,

a screen disposed over the grill and clamped by said bars against the frame, a handle lever pivotally connected to the sash closure and extending through the screen and grill-and provided with notches to engage the grill and hold the closure at adjusted positions, and means on the frame for raising the closure by the lever when in vertical position to establish interlocking engagement between the lever and frame, said engagement being maintained by the weight of the closure.

5. A ventilator unit comprising a frame, a sash closure therefor pivotally connected to the frame, a handle lever pivotally connected to the sash and adapted to be swung into positionparallelwith the sash closure, and means on the frame for raising the sash closure through the lever when in the position aforesaid to establish interlocking engagement between the lever and frame under influence of the weight of the closure and clamping the closure in closed position.

MATHEWS NELSON. 

